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UNITED STATESPATENT OFFICE.
FRANK S. WILLIAMS, OF DALHART, TEXAS.
GRAPPLE.No. 832,224.
To all whom it may concern: '
Be it known that I, FRANK S. WILLIAMs, a
citizen of the United States, residing at Dal-
hart, in the county of Hartley and State of
5 Texas, have invented a new and useful Im-
provement in Grapples, of which the follow-
ing is a specification.
My invention relates to improvements in
well-casing grabs, and pertains particularly
to to those used in oil-wells.
The object of my invention is to provide a
device of this character which can be lowered
into a well and gripped on the inside of the
well-casing at any point, whereby the same
35 may be readily removed from the cell; also,
providing means whereby the device may
be effectively released from the casing at any
time.
Another object of my invention is to pro-
20 vide a more simple and effective device of
this character to accomplish the above re-
sults.
In the accompanying drawings, Figure 1 is
a side elevation of my improved well-casing
25 grab. Fig. 2 is a vertical longitudinal sec-
tional view of Fig. 1, and Fig. 3 is an enlarged
perspective view of the jaw-expanding wedge-
block.
Referring now to the drawings, 1 repre-
30 sents a block which, as shown, is of an oblong
form and slightly tapering toward the upper
end and forming the four inclined flat faces 2,
to which are secured the downwardly-extend-
ing gripping-jaws 3, which are of an elon-
35 gated form and made of spring metal and se-
cured to the block by means of screws 4. The
lower ends of said gripping-jaws 3 are pro-
vided with outwardly - extending enlarged
portions 5, forming the biting edges 6 and the
40 beveled edges 7 for guiding the device into
the well-casing and causing its more ready'
descent into the casing, as will be hereinafter
more fully described.
The block 1 is provided with a central
45 opening 8therethrough, and passing through
said opening is an operating-rod 9, which is
provided with a washer 10 above the block
and a washer 11 below, both of which are rig-
idly secured to the rod by means of pins 12,
5o thus allowing the free rotation of the rod
within the block, but preventing a vertical
movement of the rod. The lower end of said
rod is provided with an elongated screw-
threaded portion 13, upon which is screwed a
55 heavy elongated tapering block 14. The
said block, as shown, is provided with an en-Patented, Oct. 2, 1906.
larged opening 15 and a screw-threaded open-
ing 16, through which screws the lower end
of the screw-threaded portion 13 of'the rod 9,
the enlarged opening 15 serving as means for 6o
receiving and protecting the lower screw-.
threaded end of the rod. The said block, as
before stated, is of a tapering form and is of a
size to rest between the jaws 3 and is pro-
vided with four smooth tapering faces 17, 65
against which the jaws rest. The corners of
the block 14 are cut away, as shown at 18,
and two of the opposite corners are provided'
with downwardly-curved guide-arms 19 and
20, which have their lower ends turned in- 70
wardly at 21 and are secured to the block by
means of screws 22.
From the foregoing description it will be
seen that when the device is to be lowered
into the well the guide-arms guide the same 75
into the casing, and the beveled faces of the
gripping-jaws engage the sides of the casing
and prevent the device from catching on any
uneven surface on the casing. When the
grab has been lowered to the proper place in 8c
the casing, the rod 9 is turned, drawing the
block 14 upwardly between the gripping-
jaws, and the smooth faces of the block as it
is being drawn upwardly by the threads of
the rod forces the biting edges 6 into the in- 85
ner face of the casing and engages the lower
edge of the coupling, and thus the grab is
tightly fastened within the casing. The rod
9 is then moved upwardly and the casing
withdrawn from the well. -When it is de- 90
sired to release the grab, the rod is turned in
the opposite direction and the block moved
downwardly, and the spring metal of the
gripping-jaws will draw the jaws inwardly
out of engagement with the casing. In both 95
the tightening and .loosening of the device
the four arms engaging the flat surface of the
block absolutely prevent the same from
turning.
Having thus fully described my invention, oo
what I claim as new, and desire to secure by
Letters Patent, is-
1. A well-casing grab, comprising spring
gripping-jaws, a wedging-block between said
jaws, and downwardly - extending guide- io0
arms carried by said block.
2. A well-casing grab, comprising a block,
spring gripping-jaws carried by the said
block, a rotatable rod passing through the
block but held against vertical movement, 1o
and a wedge-block screwed upon the lower
end of the rod between said jaws.Specification of Letters Patent.
Application filed January 20, 1906. Serial No, 296,988.
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Williams, Frank S. Grapple, patent, October 2, 1906; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth514122/m1/2/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.